1 /*
2 * Copyright 2018-2020 NXP
3 *
4 * SPDX-License-Identifier: BSD-3-Clause
5 *
6 */
7
8 #include <common/debug.h>
9
10 #include <plat_gic.h>
11 #include <plat_common.h>
12 #include <plat_psci.h>
13 #ifdef NXP_WARM_BOOT
14 #include <plat_warm_rst.h>
15 #endif
16
17 #include <platform_def.h>
18
19 #if (SOC_CORE_OFF || SOC_CORE_PWR_DWN)
_no_return_wfi(void)20 static void __dead2 _no_return_wfi(void)
21 {
22 _bl31_dead_wfi:
23 wfi();
24 goto _bl31_dead_wfi;
25 }
26 #endif
27
28 #if (SOC_CORE_RELEASE || SOC_CORE_PWR_DWN)
29 /* the entry for core warm boot */
30 static uintptr_t warmboot_entry = (uintptr_t) NULL;
31 #endif
32
33 #if (SOC_CORE_RELEASE)
_pwr_domain_on(u_register_t mpidr)34 static int _pwr_domain_on(u_register_t mpidr)
35 {
36 int core_pos = plat_core_pos(mpidr);
37 int rc = PSCI_E_INVALID_PARAMS;
38 u_register_t core_mask;
39
40 if (core_pos >= 0 && core_pos < PLATFORM_CORE_COUNT) {
41
42 _soc_set_start_addr(warmboot_entry);
43
44 dsb();
45 isb();
46
47 core_mask = (1 << core_pos);
48 rc = _psci_cpu_on(core_mask);
49 }
50
51 return (rc);
52 }
53 #endif
54
55 #if (SOC_CORE_OFF)
_pwr_domain_off(const psci_power_state_t * target_state)56 static void _pwr_domain_off(const psci_power_state_t *target_state)
57 {
58 u_register_t core_mask = plat_my_core_mask();
59 u_register_t core_state = _getCoreState(core_mask);
60
61 /* set core state in internal data */
62 core_state = CORE_OFF_PENDING;
63 _setCoreState(core_mask, core_state);
64
65 _psci_cpu_prep_off(core_mask);
66 }
67 #endif
68
69 #if (SOC_CORE_OFF || SOC_CORE_PWR_DWN)
_pwr_down_wfi(const psci_power_state_t * target_state)70 static void __dead2 _pwr_down_wfi(const psci_power_state_t *target_state)
71 {
72 u_register_t core_mask = plat_my_core_mask();
73 u_register_t core_state = _getCoreState(core_mask);
74
75 switch (core_state) {
76 #if (SOC_CORE_OFF)
77 case CORE_OFF_PENDING:
78 /* set core state in internal data */
79 core_state = CORE_OFF;
80 _setCoreState(core_mask, core_state);
81
82 /* turn the core off */
83 _psci_cpu_off_wfi(core_mask, warmboot_entry);
84 break;
85 #endif
86 #if (SOC_CORE_PWR_DWN)
87 case CORE_PWR_DOWN:
88 /* power-down the core */
89 _psci_cpu_pwrdn_wfi(core_mask, warmboot_entry);
90 break;
91 #endif
92 #if (SOC_SYSTEM_PWR_DWN)
93 case SYS_OFF_PENDING:
94 /* set core state in internal data */
95 core_state = SYS_OFF;
96 _setCoreState(core_mask, core_state);
97
98 /* power-down the system */
99 _psci_sys_pwrdn_wfi(core_mask, warmboot_entry);
100 break;
101 #endif
102 default:
103 _no_return_wfi();
104 break;
105 }
106 }
107 #endif
108
109 #if (SOC_CORE_RELEASE || SOC_CORE_RESTART)
_pwr_domain_wakeup(const psci_power_state_t * target_state)110 static void _pwr_domain_wakeup(const psci_power_state_t *target_state)
111 {
112 u_register_t core_mask = plat_my_core_mask();
113 u_register_t core_state = _getCoreState(core_mask);
114
115 switch (core_state) {
116 case CORE_PENDING: /* this core is coming out of reset */
117
118 /* soc per cpu setup */
119 soc_init_percpu();
120
121 /* gic per cpu setup */
122 plat_gic_pcpu_init();
123
124 /* set core state in internal data */
125 core_state = CORE_RELEASED;
126 _setCoreState(core_mask, core_state);
127 break;
128
129 #if (SOC_CORE_RESTART)
130 case CORE_WAKEUP:
131
132 /* this core is waking up from OFF */
133 _psci_wakeup(core_mask);
134
135 /* set core state in internal data */
136 core_state = CORE_RELEASED;
137 _setCoreState(core_mask, core_state);
138
139 break;
140 #endif
141 }
142 }
143 #endif
144
145 #if (SOC_CORE_STANDBY)
_pwr_cpu_standby(plat_local_state_t cpu_state)146 static void _pwr_cpu_standby(plat_local_state_t cpu_state)
147 {
148 u_register_t core_mask = plat_my_core_mask();
149 u_register_t core_state;
150
151 if (cpu_state == PLAT_MAX_RET_STATE) {
152
153 /* set core state to standby */
154 core_state = CORE_STANDBY;
155 _setCoreState(core_mask, core_state);
156
157 _psci_core_entr_stdby(core_mask);
158
159 /* when we are here, the core is waking up
160 * set core state to released
161 */
162 core_state = CORE_RELEASED;
163 _setCoreState(core_mask, core_state);
164 }
165 }
166 #endif
167
168 #if (SOC_CORE_PWR_DWN)
_pwr_suspend(const psci_power_state_t * state)169 static void _pwr_suspend(const psci_power_state_t *state)
170 {
171
172 u_register_t core_mask = plat_my_core_mask();
173 u_register_t core_state;
174
175 if (state->pwr_domain_state[PLAT_MAX_LVL] == PLAT_MAX_OFF_STATE) {
176 #if (SOC_SYSTEM_PWR_DWN)
177 _psci_sys_prep_pwrdn(core_mask);
178
179 /* set core state */
180 core_state = SYS_OFF_PENDING;
181 _setCoreState(core_mask, core_state);
182 #endif
183 } else if (state->pwr_domain_state[PLAT_MAX_LVL]
184 == PLAT_MAX_RET_STATE) {
185 #if (SOC_SYSTEM_STANDBY)
186 _psci_sys_prep_stdby(core_mask);
187
188 /* set core state */
189 core_state = CORE_STANDBY;
190 _setCoreState(core_mask, core_state);
191 #endif
192 }
193
194 else if (state->pwr_domain_state[PLAT_CLSTR_LVL] ==
195 PLAT_MAX_OFF_STATE) {
196 #if (SOC_CLUSTER_PWR_DWN)
197 _psci_clstr_prep_pwrdn(core_mask);
198
199 /* set core state */
200 core_state = CORE_PWR_DOWN;
201 _setCoreState(core_mask, core_state);
202 #endif
203 }
204
205 else if (state->pwr_domain_state[PLAT_CLSTR_LVL] ==
206 PLAT_MAX_RET_STATE) {
207 #if (SOC_CLUSTER_STANDBY)
208 _psci_clstr_prep_stdby(core_mask);
209
210 /* set core state */
211 core_state = CORE_STANDBY;
212 _setCoreState(core_mask, core_state);
213 #endif
214 }
215
216 else if (state->pwr_domain_state[PLAT_CORE_LVL] == PLAT_MAX_OFF_STATE) {
217 #if (SOC_CORE_PWR_DWN)
218 /* prep the core for power-down */
219 _psci_core_prep_pwrdn(core_mask);
220
221 /* set core state */
222 core_state = CORE_PWR_DOWN;
223 _setCoreState(core_mask, core_state);
224 #endif
225 }
226
227 else if (state->pwr_domain_state[PLAT_CORE_LVL] == PLAT_MAX_RET_STATE) {
228 #if (SOC_CORE_STANDBY)
229 _psci_core_prep_stdby(core_mask);
230
231 /* set core state */
232 core_state = CORE_STANDBY;
233 _setCoreState(core_mask, core_state);
234 #endif
235 }
236
237 }
238 #endif
239
240 #if (SOC_CORE_PWR_DWN)
_pwr_suspend_finish(const psci_power_state_t * state)241 static void _pwr_suspend_finish(const psci_power_state_t *state)
242 {
243
244 u_register_t core_mask = plat_my_core_mask();
245 u_register_t core_state;
246
247
248 if (state->pwr_domain_state[PLAT_MAX_LVL] == PLAT_MAX_OFF_STATE) {
249 #if (SOC_SYSTEM_PWR_DWN)
250 _psci_sys_exit_pwrdn(core_mask);
251
252 /* when we are here, the core is back up
253 * set core state to released
254 */
255 core_state = CORE_RELEASED;
256 _setCoreState(core_mask, core_state);
257 #endif
258 } else if (state->pwr_domain_state[PLAT_MAX_LVL]
259 == PLAT_MAX_RET_STATE) {
260 #if (SOC_SYSTEM_STANDBY)
261 _psci_sys_exit_stdby(core_mask);
262
263 /* when we are here, the core is waking up
264 * set core state to released
265 */
266 core_state = CORE_RELEASED;
267 _setCoreState(core_mask, core_state);
268 #endif
269 }
270
271 else if (state->pwr_domain_state[PLAT_CLSTR_LVL] ==
272 PLAT_MAX_OFF_STATE) {
273 #if (SOC_CLUSTER_PWR_DWN)
274 _psci_clstr_exit_pwrdn(core_mask);
275
276 /* when we are here, the core is waking up
277 * set core state to released
278 */
279 core_state = CORE_RELEASED;
280 _setCoreState(core_mask, core_state);
281 #endif
282 }
283
284 else if (state->pwr_domain_state[PLAT_CLSTR_LVL] ==
285 PLAT_MAX_RET_STATE) {
286 #if (SOC_CLUSTER_STANDBY)
287 _psci_clstr_exit_stdby(core_mask);
288
289 /* when we are here, the core is waking up
290 * set core state to released
291 */
292 core_state = CORE_RELEASED;
293 _setCoreState(core_mask, core_state);
294 #endif
295 }
296
297 else if (state->pwr_domain_state[PLAT_CORE_LVL] == PLAT_MAX_OFF_STATE) {
298 #if (SOC_CORE_PWR_DWN)
299 _psci_core_exit_pwrdn(core_mask);
300
301 /* when we are here, the core is back up
302 * set core state to released
303 */
304 core_state = CORE_RELEASED;
305 _setCoreState(core_mask, core_state);
306 #endif
307 }
308
309 else if (state->pwr_domain_state[PLAT_CORE_LVL] == PLAT_MAX_RET_STATE) {
310 #if (SOC_CORE_STANDBY)
311 _psci_core_exit_stdby(core_mask);
312
313 /* when we are here, the core is waking up
314 * set core state to released
315 */
316 core_state = CORE_RELEASED;
317 _setCoreState(core_mask, core_state);
318 #endif
319 }
320
321 }
322 #endif
323
324 #if (SOC_CORE_STANDBY || SOC_CORE_PWR_DWN)
325
326 #define PWR_STATE_TYPE_MASK 0x00010000
327 #define PWR_STATE_TYPE_STNDBY 0x0
328 #define PWR_STATE_TYPE_PWRDWN 0x00010000
329 #define PWR_STATE_LVL_MASK 0x03000000
330 #define PWR_STATE_LVL_CORE 0x0
331 #define PWR_STATE_LVL_CLSTR 0x01000000
332 #define PWR_STATE_LVL_SYS 0x02000000
333 #define PWR_STATE_LVL_MAX 0x03000000
334
335 /* turns a requested power state into a target power state
336 * based on SoC capabilities
337 */
_pwr_state_validate(uint32_t pwr_state,psci_power_state_t * state)338 static int _pwr_state_validate(uint32_t pwr_state,
339 psci_power_state_t *state)
340 {
341 int stat = PSCI_E_INVALID_PARAMS;
342 int pwrdn = (pwr_state & PWR_STATE_TYPE_MASK);
343 int lvl = (pwr_state & PWR_STATE_LVL_MASK);
344
345 switch (lvl) {
346 case PWR_STATE_LVL_MAX:
347 if (pwrdn && SOC_SYSTEM_PWR_DWN)
348 state->pwr_domain_state[PLAT_MAX_LVL] =
349 PLAT_MAX_OFF_STATE;
350 else if (SOC_SYSTEM_STANDBY)
351 state->pwr_domain_state[PLAT_MAX_LVL] =
352 PLAT_MAX_RET_STATE;
353 /* intentional fall-thru condition */
354 case PWR_STATE_LVL_SYS:
355 if (pwrdn && SOC_SYSTEM_PWR_DWN)
356 state->pwr_domain_state[PLAT_SYS_LVL] =
357 PLAT_MAX_OFF_STATE;
358 else if (SOC_SYSTEM_STANDBY)
359 state->pwr_domain_state[PLAT_SYS_LVL] =
360 PLAT_MAX_RET_STATE;
361 /* intentional fall-thru condition */
362 case PWR_STATE_LVL_CLSTR:
363 if (pwrdn && SOC_CLUSTER_PWR_DWN)
364 state->pwr_domain_state[PLAT_CLSTR_LVL] =
365 PLAT_MAX_OFF_STATE;
366 else if (SOC_CLUSTER_STANDBY)
367 state->pwr_domain_state[PLAT_CLSTR_LVL] =
368 PLAT_MAX_RET_STATE;
369 /* intentional fall-thru condition */
370 case PWR_STATE_LVL_CORE:
371 stat = PSCI_E_SUCCESS;
372
373 if (pwrdn && SOC_CORE_PWR_DWN)
374 state->pwr_domain_state[PLAT_CORE_LVL] =
375 PLAT_MAX_OFF_STATE;
376 else if (SOC_CORE_STANDBY)
377 state->pwr_domain_state[PLAT_CORE_LVL] =
378 PLAT_MAX_RET_STATE;
379 break;
380 }
381 return (stat);
382 }
383
384 #endif
385
386 #if (SOC_SYSTEM_PWR_DWN)
_pwr_state_sys_suspend(psci_power_state_t * req_state)387 static void _pwr_state_sys_suspend(psci_power_state_t *req_state)
388 {
389
390 /* if we need to have per-SoC settings, then we need to
391 * extend this by calling into psci_utils.S and from there
392 * on down to the SoC.S files
393 */
394
395 req_state->pwr_domain_state[PLAT_MAX_LVL] = PLAT_MAX_OFF_STATE;
396 req_state->pwr_domain_state[PLAT_SYS_LVL] = PLAT_MAX_OFF_STATE;
397 req_state->pwr_domain_state[PLAT_CLSTR_LVL] = PLAT_MAX_OFF_STATE;
398 req_state->pwr_domain_state[PLAT_CORE_LVL] = PLAT_MAX_OFF_STATE;
399
400 }
401 #endif
402
403 #if defined(NXP_WARM_BOOT) && (SOC_SYSTEM_RESET2)
psci_system_reset2(int is_vendor,int reset_type,u_register_t cookie)404 static int psci_system_reset2(int is_vendor,
405 int reset_type,
406 u_register_t cookie)
407 {
408 int ret = 0;
409
410 INFO("Executing the sequence of warm reset.\n");
411 ret = prep_n_execute_warm_reset();
412
413 return ret;
414 }
415 #endif
416
417 static plat_psci_ops_t _psci_pm_ops = {
418 #if (SOC_SYSTEM_OFF)
419 .system_off = _psci_system_off,
420 #endif
421 #if (SOC_SYSTEM_RESET)
422 .system_reset = _psci_system_reset,
423 #endif
424 #if defined(NXP_WARM_BOOT) && (SOC_SYSTEM_RESET2)
425 .system_reset2 = psci_system_reset2,
426 #endif
427 #if (SOC_CORE_RELEASE || SOC_CORE_RESTART)
428 /* core released or restarted */
429 .pwr_domain_on_finish = _pwr_domain_wakeup,
430 #endif
431 #if (SOC_CORE_OFF)
432 /* core shutting down */
433 .pwr_domain_off = _pwr_domain_off,
434 #endif
435 #if (SOC_CORE_OFF || SOC_CORE_PWR_DWN)
436 .pwr_domain_pwr_down_wfi = _pwr_down_wfi,
437 #endif
438 #if (SOC_CORE_STANDBY || SOC_CORE_PWR_DWN)
439 /* cpu_suspend */
440 .validate_power_state = _pwr_state_validate,
441 #if (SOC_CORE_STANDBY)
442 .cpu_standby = _pwr_cpu_standby,
443 #endif
444 #if (SOC_CORE_PWR_DWN)
445 .pwr_domain_suspend = _pwr_suspend,
446 .pwr_domain_suspend_finish = _pwr_suspend_finish,
447 #endif
448 #endif
449 #if (SOC_SYSTEM_PWR_DWN)
450 .get_sys_suspend_power_state = _pwr_state_sys_suspend,
451 #endif
452 #if (SOC_CORE_RELEASE)
453 /* core executing psci_cpu_on */
454 .pwr_domain_on = _pwr_domain_on
455 #endif
456 };
457
458 #if (SOC_CORE_RELEASE || SOC_CORE_PWR_DWN)
plat_setup_psci_ops(uintptr_t sec_entrypoint,const plat_psci_ops_t ** psci_ops)459 int plat_setup_psci_ops(uintptr_t sec_entrypoint,
460 const plat_psci_ops_t **psci_ops)
461 {
462 warmboot_entry = sec_entrypoint;
463 *psci_ops = &_psci_pm_ops;
464 return 0;
465 }
466
467 #else
468
plat_setup_psci_ops(uintptr_t sec_entrypoint,const plat_psci_ops_t ** psci_ops)469 int plat_setup_psci_ops(uintptr_t sec_entrypoint,
470 const plat_psci_ops_t **psci_ops)
471 {
472 *psci_ops = &_psci_pm_ops;
473 return 0;
474 }
475 #endif
476